#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>
#include<assert.h>
void* my_memcpy(void* dest,const void* src,size_t num)
{
	void* ret = dest;
	assert(dest != NULL && src != NULL);
	while(num--)
	{
		*(char*)dest = *(char*)src;
		dest = (char*)dest + 1;
		src = (char*)src + 1;
	}
	return ret;
}
int main()
{
	int arr1[20] = {1,2,3,4,5,6,7,8};
	int arr2[20] = {0};
	my_memcpy(arr2,arr1,20);
	return 0;
}